A copper manganese ferrite nanoparticles from effective ferrites that applicable in sensitivity investigations was prepared in this study. Co-precipitation method was used for synthesis of this ferrite that is useful method for synthesizing of these compounds. For structure evaluation, X-ray diffraction (XRD) experiments for phase formation confidence and transmission electron microscopy (TEM) for formation of nanoparticles below 30 nm scale confidence were used. By X-ray fluorescence (XRF) experiment exact percent of each element was determined in copper manganese ferrite compound. By (AGFM) experiments the magnetic behavior of powder and disk sample of copper manganese ferrite nanoparticles was determined. For sensitivity properties investigation of these nanoparticles, mentioned nanoparticles were converted to a tablet form. This tablet was putted in a temperature controlled box. Nine solvents were vaporized (gases) and exposed to this nanoparticles. Responses to these gases were transmitted to a computer by an electronic board connection. Result information was analyzed by software. Sensitivity study of this nano sensor was tested by using carbon tetrachloride, ethanol, methanol, acetonitrile, acetone, vinyl acetate, acrylonitrile, ammonia and formamide. Among these gases ethanol had the best sensitivity in 100˚C temperature.
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